I-Data 812-1x MIO Benutzerhandbuch

An ESC Character can be any character you wish, but before you
define it you should consider the following:

•

Once the ESC character has been defined, it cannot be
printed. For this reason it is advisable to select a character
you know will not normally appear in the data stream. If the
character defined appears elsewhere in the data stream (i.e.
outside an FSL Function), the interface will regard it as an
ESC character and you will get a syntax error.

•

However, you do not need to have an ESC Character 
defined all the time. When it has served its purpose you can 
remove it again (see  Figure 7-2 below).

The ESC Character may be defined as a  temporary as well as a
permanent ESC Character.

Figure 7-1 shows how to define "%" as a temporary ESC Character.

&&??%

Since the temporary ESC Character is defined in the temporary
memory (RAM) alone, it is only in effect as long as there is power on
the printer, or until you remove it again. To remove it you define it as
"space" (illustrated in  Figure 7-2).

&&??<space>